The U.S. Department of Energy has completed Series 20 of testing through the DOE Solid-State Lighting CALiPER program, and a summary of the results is now available for download on the DOE SSL website. Report 20 evaluates the independently tested photometric performance of 38 LED PAR38 lamps, with results showing significant improvement versus earlier CALiPER testing of similar products. All of the LED PAR38 lamps tested offer substantial energy savings compared to halogen PAR38 lamps, and some are more efficacious than compact fluorescent or ...